What are the commonly used raw materials for plastic convenient bags, don’t worry, the following editor will introduce you:
1. High-pressure polyethylene plastic convenient bag
High-pressure polyethylene is also called low-density polyethylene (LDPE). In the semi-transparent state, plastic bag products are usually more transparent than low-pressure polyethylene. There are three main uses:
A. Food packaging: pastries, candies, fried, pastries, milk powder, salt, tea, etc.
B. Textile packaging: shirts, clothing, bedding, chemical fiber products
C. Daily chemical product packaging.
Plastic convenient bag
2. Low pressure polyethylene plastic convenient bag
Low-pressure polyethylene is also called high-density polyethylene (HDPE). It has high crystallinity and poor transparency. It is usually translucent and has lower transparency than HDPE high-pressure polyethylene plastic bag products. There are four main uses.
A. Garbage bags, bacterial seed bags;
B. Toilets, shopping bags, handbags, backpacks;
C. Plastic fresh-keeping bag;
D. Woven bag inner bag
3. Polypropylene plastic convenient bag
Compared with polyethylene, the crystallization ability of polypropylene may be much weaker. In particular, amorphous polypropylene has the weakest crystallinity, and the transparency of plastic bag products is relatively high. Mainly used for packaging fibers, knitwear, clothing, shirts, etc. The first three plastic bags are not easy to be dyed or printed due to their non-polar material structure and require surface printing treatment.
4. Polyvinyl chloride plastic convenient bag
Compared with the first three plastic convenient bags, a substance called chlorine is introduced into the material structure, the crystallization effect is weak, and the product transparency is high. Due to the addition of chlorine, the material itself is polar, so the coloring is easy to print.
A. Gift bag;
B. Bags, needle cotton bags, cosmetics bags;
This article introduces plastic convenience bags made of four common raw materials. Do you think it is easy to identify the things on the market? In fact, there are very few single-component plastic convenience bags at present, and it is difficult to identify them.